  High fidelity quantum control over qubits is of crucial importance for
realistic quantum computing, and it turns to be more challenging when there are
inevitable interactions among qubits. By employing a bandselective shaped
pulse, we demonstrate a high fidelity flip over electron spin of
nitrogen-vacancy (NV) centers in diamond. In contrast with traditional
rectangular pulses, the shaped pulse has almost equal excitation effect among a
sharply edged region (in frequency domain). So the three sub-levels of host
$^{14}N$ nuclear spin can be flipped accurately at the same time, while the
redundant flip of other sublevels (e. g. of a nearby $^{13}C$ nuclear spin ) is
well suppressed. The shaped pulse can be applied to a large amount of quantum
systems in which band-selective operation are required.
