The invention relates to an underground fracturing sliding sleeve tool switch which comprises an identification mechanism, a transmission mechanism, a clamping and locking mechanism and a sealing mechanism, the transmission mechanism comprises a shell, a transmission shaft and a transmission spring, the shell is a cylinder, and a stepped hole is formed in the shell along a central shaft; the recognition mechanism comprises an axial recognition sliding block, a gear recognition sliding block and a first balance sliding block, and the first balance sliding block and the sliding blocks are installed in corresponding installation holes of the shell in a telescopic mode respectively. The axial recognition sliding block is provided with a sliding ruler, the lower bottom face of the sliding ruler is an inclined face, the sliding ruler extends into the sliding ruler sliding way, and the gear recognition sliding block is provided with a transmission rack. The transmission shaft is integrally formed by a circular shaft, a transmission gear shaft and a regular hexagonal shaft from top to bottom; the clamping and locking mechanism comprises a dog tooth, a dog tooth cam and a dog tooth base; the sealing mechanism comprises sealing rubber, a sealing sliding block and a front cap. The safety and stability of the mechanism can be integrally improved, accurate recognition is truly achieved, and the sealing effect is good.