The moves are part of a "common pattern for Beijing", according to analysts, who fear more disruptions of agricultural and food trade can be expected in the coming days.
China has rolled out curbs on the import of fruit and fish from Taiwan, while halting shipments of sand to the island in the wake of a visit by US House Speaker Nancy Pelosi.
China's Customs Administration said on Wednesday it would suspend some citrus fruit imports from Taiwan over alleged "repeated" detection of excessive pesticide residue, and the import of fish owing to positive coronavirus tests on packages.
In a separate notice, the Commerce Ministry added it would also "suspend the export of natural sand to Taiwan" from Wednesday, without providing details.
Natural sand is generally used for producing concrete and asphalt, and most of Taiwan's imported sand and gravel comes from China.
The moves are part of a "common pattern for Beijing", said Even Pay, an agriculture analyst at consultancy Trivium China.
More disruptions of agricultural and food trade can be expected in the coming days, she added.
"When diplomatic or trade tensions are running high, Chinese regulators typically take an extremely strict approach to compliance... looking for any issues that can be used to justify a trade ban," she said.
The trip by Pelosi, who is second in line to the presidency and the highest-profile elected US official to visit Taiwan in 25 years, has ignited a diplomatic firestorm.
READ MORE: US defends Pelosi's Taiwan visit as angry China warns of 'consequences'
China is Taiwan's biggest trading partner and export market, with bilateral trade growing 26 percent on-year to $328 billion in 2021, official data shows.
It is not the first time Beijing has taken aim at the island's exports.
China banned pineapple imports in March 2021, citing the discovery of pests, in a move that was widely seen as politically driven.
Beijing has ramped up pressure on Taiwan since President Tsai Ing-wen took office in 2016, as she views the island as a de facto sovereign nation and not part of "one China".
On top of the latest bans, Taipei's Council of Agriculture said Tuesday that China had cited regulatory breaches in suspending the import of other Taiwanese goods, including fishery products, tea and honey.
Meanwhile, Chinese authorities also announced planned live-fire military drills encircling Taiwan, in a move Taipei's defence ministry said threatened key ports and urban areas.
At some points, the zone of Chinese operations will come within 20 kilometres (12.4 miles) of Taiwan's shoreline, according to coordinates shared by the People's Liberation Army.
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