A second level trigger system is being introduced to the KEK TRISTAN VENUS experiment. The system consists of a TRANSPUTER array of 2‐dimensional lattice and several kinds of interfacing modulus. TRANSPUTER chips are mounted on these modules. Trigger data are all transferred using high speed serial links which connect the processors. The system is applied to the central drift chamber to perform track finding using its hit information. A data acquistion module attached to each FASTBUS crate gathers the hit wire pattern and transfers it to the processor array through its link. Track finding is performed in parallel form by sharing the data. The results is also transferred to a master FPI (FASTBUS Processor Interface) via a link. It takes less than 1 millisecond to distribute pattern data into the array and fast tracking less than 8 milliseconds was achieved.