To provide a yarn winding device highly accurately and automatically detecting the rotation failure of a package.

An automatic winder is provided with a winding unit 16 and a base control device 11. The winding unit 16 performs the winding work of yarn. The base control device 11 controls the winding unit 16 and is provided with a theoretical package calculation part 27 and an operation part 17. The theoretical package calculation part 27 calculates a theoretical package rotation speed. The operation part 17 determines an alarm threshold value for determining the rotation failure of the package based on the theoretical package rotation speed. The alarm threshold value is input to the winding unit 16. An alarm determination part 76 provided to the winding unit 16 performs an alarm determination by comparing the actual rotation speed of the package with the alarm threshold value.