The invention relates to a shear type offshore laver harvester. The harvester comprises a
machine frame, an engine, a reduction gearbox, a belt-type transmission chain, a transmission shaft, a
bevel gear transmission mechanism, a turning disc, a
crank link transmission mechanism, a movable
cutting tool and a fixed
cutting tool, wherein the motor and the reduction gearbox are arranged on the
machine frame, an output shaft of the engine is connected with an input shaft of the reduction gearbox, tan output shaft of the reduction gearbox is in transmission connection with the transmission shaft through the belt-type transmission chain, the transmission shaft is loaded on the
machine frame, the transmission shaft is in transmission connection with the turning disc through the
bevel gear transmission mechanism, the turning disc is in transmission connection with the movable
cutting tool through the
crank link transmission mechanism to allow the movable
cutting tool to move left and right and shear relative to the fixed
cutting tool, and fixed
cutting tool is arranged on the machine frame below the movable cutting tool. The invention has the advantages of effectively controlling
cut length of laver, avoiding crushing the laver like the prior laver harvester, achieving high cutting quality, along with simple structure, more mechanical advantages, stable transmission, and can meet requirements for high-efficient harvest of large areas of laver.