The invention discloses a cable tinning machine. The cable tinning machine comprises a tool clamp, a charging mechanism, a grabbing mechanism, a first scaling powder adding device, a second scaling powder adding device and a tin spraying machine. The charging mechanism comprises a charging conveying guide rail, a lifting table and a blocking device. The grabbing mechanism comprises a grabbing device and a three-dimensional driving system. The tool clamp loaded with cables is lifted by the lifting table after passing through the charging conveying guide rail, the grabbing device is driven by the three-dimensional driving system to grab the tool clamp, and the tool clamp and the cables on the tool clamp are moved to the first scaling powder adding device together; then the cables are sent into the tin spraying machine; and after tinning is completed, the cables are moved to the second scaling powder adding device through the grabbing mechanism. According to the technical scheme, the phenomenon that the cables are disengaged from groove positions due to a chain conveying device in the feeding process in the prior art can be effectively avoided through the cable tinning machine, so that the product quality and production efficiency are improved.