The disclosure provides a method and a device in a base station and a User Equipment (UE) for power adjustment. The UE first transmits a first radio signal. The first radio signal occupies T time unit(s) in time domain, and the T is used for determining a first component. A first reference power is in linear correlation with the first component. A transmit power of the first radio signal is a first power, and the first reference power is used for determining the first power. The T is a positive integer. The above method can ensure that the first radio signal keeps a stable coverage in the condition that the first radio signal occupies different numbers of time units.