I use two LTC4162-L.
Can two LTC4162-Ls use the same I2C line?
In other words, I want to connect two LTC4162-L to I2C of MCU.
Please check quickly.
The I2C address is given in the spec table on page 6. The LTC4162 has a single, unchangeable I2C address which should be assumed for any chip unless otherwise specified, so there's not a specific section to point you to.
As a general solution to using multiple chips with the same address on the same bus, you should use a I2C multiplexer as Fritz suggested. LTC4305 is one such example to start with.